Knock Knock / Who’s there? / Tunis!
Tunis company, three’s a crowd!
What the crap is a Tunis anyway? Like some country in Africa? Why would that be at my door?
Oh. my. goodness. I need to stop doing knock-knock jokes. This isn't funny at all, and I like puns.
Would you guys stop submitting knock-knock jokes - seriously?
I can't handle this.
The reason why this "joke" is "funny" is that Tunis "sounds like" Two is, and there is a common colloquial phrase in English "Two is company, three's a crowd".
This must be some example of anti-humor because that is not funny at all.